Results The diagnostic accuracy of high frequency ultrasound was 81.6% (31/38), including 18 cases of meniscal tear, 7 cases of loose body and 6 cases of synovial lesions.

结果术前高频超声提示正确率为81。 6% （31 /38），其中包括半月板损伤18例、关节内游离体7例及滑膜病变6例。

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Objective: To investigate the diagnosing value of high frequency sonography for the meniscus lesions.

前言：目的：探讨高频超声对半月板损伤的诊断价值。

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Objective: To investigate the causes and the treatment means of delayed hemorrhage after removing colorectal polyps and polypoid Lesions with high frequency electrocoagulation.

目的：探讨大肠息肉及息肉样病变高频电凝切除术后延迟出血发生的原因及处理措施。

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